replacement window seal/weatherstripping
A handy person from Edmonton, Alberta, Canada says:
October 5, 2016
this weather stripping was in a wood window manufactured by Willmar. the bubble has two small ribs/fins. The weather stripping slots in place in two grooves in the window frame, one for the barbed kerf and one shallower groove for the "front edge" on the right side in the photo..
Tom from SWISCO responded:
October 10, 2016